/// <reference types="node" />
/**
 * Hashes the data with the optional encoding specified. If no encoding is specified, it is assumed that the data is
 * already a Buffer.
 *
 * @param {string | Buffer} data
 * @param {BufferEncoding} [encoding]
 * @return {Buffer}
 */
export declare const keccak256: (data: string | Buffer, encoding?: "ascii" | "utf8" | "utf-8" | "utf16le" | "ucs2" | "ucs-2" | "base64" | "latin1" | "binary" | "hex" | undefined) => Buffer;
/**
 * Get a string as Buffer, with the optional encoding specified. If no encoding is specified, it is assumed that the
 * data is a hexadecimal string. The string can optionally contain the 0x prefix.
 *
 * @param {string} data
 * @param {BufferEncoding} encoding
 */
export declare const toBuffer: (data: string, encoding?: "ascii" | "utf8" | "utf-8" | "utf16le" | "ucs2" | "ucs-2" | "base64" | "latin1" | "binary" | "hex" | undefined) => Buffer;